N-CSRS: Others
N-PX: Others
497: Periodic update to fund prospectus
497J: Others
485BPOS: Post-effective amendment
N-CEN: Others
24F-2NT: Others
N-CSR: Others
First Trust Natural Gas ETF | NPORT-P: Others
497: Periodic update to fund prospectus
N-CSRS: Others
497: Periodic update to fund prospectus
N-PX: Others
First Trust Natural Gas ETF | NPORT-P: Others
497J: Others
485BPOS: Post-effective amendment
24F-2NT: Others
N-CSR: Others
N-CEN: Others
First Trust Natural Gas ETF | NPORT-P: Others